doc-src/TutorialI/Misc/fakenat.thy
author wenzelm
Sun, 30 Jan 2011 13:02:18 +0100
changeset 41648 6d736d983d5c
parent 16417 9bc16273c2d4
permissions -rw-r--r--
clarified example settings for Proof General;

(*<*)
theory fakenat imports Main begin;
(*>*)

text{*\noindent
The type \tydx{nat} of natural
numbers is predefined to have the constructors \cdx{0} and~\cdx{Suc}.  It  behaves as if it were declared like this:
*}

datatype nat = 0 | Suc nat
(*<*)
end
(*>*)